A user apparatus that uses a plurality of subcarrier spacings is disclosed. The user apparatus includes a receiver that receives a synchronization signal and system information. The user apparatus further includes a processor that determines, on a basis of the subcarrier spacings, positions of symbols to which periodic blocks including the synchronization signal and the system information are mapped. In other aspects, a base station apparatus and a communication method are also disclosed.
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6. A base station that uses a plurality of subcarrier spacings including 15 kHz, 30 kHz, 120 kHz, and 240 kHz, the base station comprising:
a processor that maps periodic blocks including a synchronization signal and system information to one or more symbols on a basis of one of the plurality of subcarrier spacings; and
a transmitter that transmits the synchronization signal and the system information,
wherein a period during which the periodic blocks are mapped is arranged to be common across the subcarrier spacings,
wherein the transmitter transmits a signal in which a position of the symbols is determined on a basis of the subcarrier spacings, and
wherein a maximum number of the periodic blocks included in an ss burst in a case where the subcarrier spacing is 120 kHz is the same as a maximum number of periodic blocks included in the ss burst in a case where the subcarrier spacing is 240 kHz.
7. A communication method executed by a terminal that uses a plurality of subcarrier spacings including 15 kHz, 30 kHz, 120 kHz, and 240 kHz, the communication method comprising:
receiving, based on one of the plurality of subcarrier spacings, one or more symbols to which periodic blocks including a synchronization signal and system information are mapped;
performing random access by using a resource associated with the periodic blocks,
wherein a period during which the periodic blocks are mapped is arranged to be common across the subcarrier spacings; and
receiving a signal in which a position of the symbols is determined on a basis of the subcarrier spacings,
wherein a maximum number of the periodic blocks included in an ss burst in a case where the subcarrier spacing is 120 kHz is the same as a maximum number of periodic blocks included in the ss burst in a case where the subcarrier spacing is 240 kHz.
1. A terminal that uses a plurality of subcarrier spacings including 15 kHz, 30 kHz, 120 kHz, and 240 kHz, the terminal comprising:
a receiver that receives, based on one of the plurality of subcarrier spacings, one or more symbols to which periodic blocks including a synchronization signal and system information are mapped; and
a processor that performs random access by using a resource associated with the periodic blocks,
wherein a period during which the periodic blocks are mapped is arranged to be common across the subcarrier spacings,
wherein the receiver receives a signal in which a position of the symbols is determined on a basis of the subcarrier spacings, and
wherein a maximum number of the periodic blocks included in an ss burst in a case where the subcarrier spacing is 120 kHz is the same as a maximum number of periodic blocks included in the ss burst in a case where the subcarrier spacing is 240 kHz.
2. The terminal as claimed in
wherein the receiver receives the signal in which the position of the symbols of the periodic blocks are separated from positions of symbols of control signals.
3. The terminal as claimed in
wherein the receiver receives a signal in which a symbol position of a first periodic block and a symbol position of a second periodic block are non-continuous.
4. The terminal as claimed in
wherein the receiver receives a signal in which a symbol position of a first periodic block and a symbol position of a second periodic block are non-continuous.
5. The terminal as claimed in
wherein the receiver receives a signal in which one or more symbols that do not include a synchronization signal are arranged between a symbol of the first periodic block and a symbol of the second periodic block.
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The present invention relates to a base station apparatus in a radio communication system.
Concerning 3GPP (3rd Generation Partnership Project), a radio communication scheme called 5G or NR (New Radio) (hereinafter, such a radio communication scheme being referred to as “NR”) has been discussing a further increase in the system capacity, a further increase in the data transmission rate, a further reduction in the delay in the radio section, and so forth. Concerning the NR, various radio technologies have been studied for a satisfaction of a requirement for the throughput greater than or equal to 10 Gbps and the delay in the radio section less than or equal to 1 ms.
According to the NR, in an initial access for establishing a connection between a user apparatus and a base station apparatus, the user apparatus performs cell detection and cell identification using a synchronization signal transmitted from the base station apparatus and obtains some of system information required for the initial access (for example, Non-patent Document No. 1).
In addition, concerning the NR, discussions have been made for applying different SCSs (Subcarrier-Spacings) as structures of radio frames. In this regard, for example, 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz are assumed as SCSs. Moreover, concerning the NR, it is assumed to use a wide range of frequencies from a low frequency band similar to LTE (Long Term Evolution) to a further higher frequency band. In particular, because there is a high propagation loss in a high-frequency band, discussions have been made for applying beam forming having a narrow beam width in order to compensate for the propagation loss (for example, Non-patent Document No. 2).
According to the NR, a synchronization signal and some of system information required for an initial access are mapped in a radio frame on the basis of resource units called SS blocks (Synchronization Signal Blocks) including continuous (consecutive) OFDM (Orthogonal Frequency Division Multiplexing) symbols. Moreover, according to the NR, a case is assumed in which different SCSs are applied to radio frames in parallel.
In this regard, because SS blocks are transmitted from a base station apparatus repeatedly, there may be a case where, during a period during which SS blocks are mapped in a radio frame to which a different SCS is applied, an opportunity (occasion) to transmit a DL (Downlink) or UL (Uplink) control signal is prevented (inhibited).
The present invention has been made in view of the above and an object of the present invention is to provide a technology in a radio communication system including a base station apparatus and a user apparatus for the base station apparatus to appropriately arrange blocks including a synchronization signal and system information in a radio signal in order to implement an efficient resource arrangement.
According to the disclosed technology, a base station apparatus that performs communication with a plurality of user apparatuses includes a transmission unit that transmits a plurality of radio signals to the plurality of user apparatuses; and a control unit that arranges periodic blocks including a synchronization signal and system information in one or a plurality of radio signals from among the plurality of radio signals on the basis of subcarrier spacings.
According to the disclosed technology, in a radio communication system including a base station apparatus and a user apparatus, a technology is provided for appropriately arranging blocks including a synchronization signal and system information in a radio signal in order to implement an efficient resource arrangement.
Below, embodiment(s) of the present invention will be described with reference to the drawings. Note that the embodiments that will be described are merely examples and the embodiments to which the present invention is applied are not limited to the embodiments that will be described.
Existing technologies may be used for a radio communication system according to an embodiment of the present invention in order to operate appropriately. In this regard, the existing technologies include, for example, existing LTE. However, the existing technologies are not limited to the existing LTE. Further, unless otherwise noted, “LTE” used herein has a wide meaning covering LTE-Advanced and schemes developed after LTE-Advanced (for example, the NR).
Moreover, in the following description of an embodiment, terms such as a SS (Synchronization Signal), a PSS (Primary SS), a SSS (Secondary SS), a PBCH (Physical broadcast channel), and so forth included in the existing LTE are used. However, these terms are described for the sake of convenience of explanation, and, similar signals, functions, and so forth may be referred to by different names. Moreover, the above-described terms in the NR will be referred to as an NR-SS, an NR-PSS, an NR-SSS, an NR-PBCH, and so forth.
Below, an entire system configuration and an example of an initial access will be described as a basic example, and thereafter, first and second embodiments of the present invention will be described. The first and second embodiments are based on the basic example. However, the first and second embodiments may be based on a system or an initial access different from the system or the initial access of the basic example.
<Entire System Configuration>
The base station apparatus 100 provides one or more cells and is a communication apparatus that performs communication with the user apparatus 200. As illustrated in
Hereinafter, transmission of a signal with the use of a transmission beam has the same meaning as transmission of a signal multiplied with a precoding vector (or precoded with a precoding vector). In the same way, reception with the use of a reception beam has the same meaning as multiplying a received signal with a predetermined weight vector. In addition, transmission of a signal with the use of a transmission beam may be expressed as transmission of a signal with the use of a specific antenna port. In the same way, reception of a signal with the use of a reception beam may be expressed as reception of a signal with the use of a specific antenna port. An antenna port means a logical antenna port defined in the 3GPP standard. Note that methods of forming a transmission beam and a reception beam are not limited to the above-mentioned methods. For example, also a method of changing respective angles of a plurality of antennas of the user apparatus 10 or the base station 20 may be used. Also a method of combining the method of using a precoding vector with the method of changing angles of antennas may be used. Also another method may be used. Moreover, for example, in a high-frequency band, a plurality of different transmission beams may be used. Using a plurality of transmission beams will be referred to as a multi-beam operation; using a single transmission beam will be referred to as a single-beam operation.
<Example of Initial Access>
An “SS burst set” illustrated in
A “slot” illustrated in
For example, in a case of multi-beam operation, the user apparatus 200 detects and obtains an SS block from among the SS blocks #0-#8 and uses a resource associated with the SS block to perform an initial access to the base station apparatus 100.
Below, a first embodiment will be described. Note that, in the description of the first and second embodiments, improvement points with respect to the above-described basic example will be described. Therefore, the basic example is applied unless otherwise described. Moreover, each of the first and second embodiments may be implemented alone. Also, a combination of the first and second embodiments may be implemented.
In step S1, the base station apparatus 100 maps SS blocks in a radio frame on the basis of an SCS. That is, mapping of SS blocks with one SCS may be different from mapping of SS blocks with another SCS.
In step S2, the base station apparatus 100 arranges (places) one or a plurality of symbols between SS blocks within a SS burst set on the basis of the SCS. The number of the symbols may be zero (0). During the period during which the symbols are arranged (placed), opportunities to transmit control signals may be increased. Opportunities to transmit control signals mean opportunities to transmit control signals that are transmitted by the base station apparatus 100 or the user apparatus 200 in a radio frame configured with an SCS different from the SCS of the radio frame in which SS blocks are transmitted.
Note that step S2 illustrates an example of mapping. For example, the base station apparatus 100 may perform mapping also according to the second embodiment that will be described later, or may perform mapping on the basis of another SCS.
Note that, by receiving the SS blocks mapped in the radio frame in the above-described step, the user apparatus 200 performs synchronization and obtains information needed for a random access to implement an initial access.
Note that, in a case where SS blocks are mapped in a radio frame in the above-described manner, the user apparatus 200 can transmit and receive control signals during periods between SS blocks where an SS is not placed.
Note that, in the same way as in
In a case of avoiding overlapping between SS blocks and control signals by non-continuously (non-consecutively) mapping SS blocks in consideration for opportunities to transmit control signals, the user apparatus 200 needs to have a longer search window to observe non-continuously mapped SS blocks, and power consumption accordingly becomes a concern. By mapping SS blocks according to SCSs as illustrated in
According to the above-described first embodiment, as a result of the base station apparatus 100 performing appropriate mapping of SS blocks in a radio frame on the basis of SCSs, it is possible to implement an efficient resource arrangement for transmitting control signals.
In this regard, concerning obtaining specific SS blocks associated with a beam necessary for the user apparatus 200 to start communication, the number of SS blocks needed to be placed in each slot differs according to SCSs. By changing the number of SS blocks to be placed in each slot according to SCSs, the user apparatus 200 can receive, in the same period regardless of the SCS, SS blocks that are required to be received to complete a measurement. Therefore, the user apparatus 200 can have the same measurement period regardless of SCSs. Thus, the user apparatus 200 can implement an efficient measurement.
Moreover, the base station apparatus 100 maps SS blocks in radio frames that have symbol arrangements as illustrated in
According to the above-described second embodiment, as a result of the base station apparatus 100 appropriately mapping SS blocks in a radio frame on the basis of SCSs, flexibility of scheduling control signals is maintained, and the user apparatus 200 can complete a measurement in a measurement period common to different SCSs.
(Apparatus Configuration)
Next, a functional configuration example of the base station apparatus 100 and the user apparatus 200 implementing the above-described processes and operations will be described. Each of the base station apparatus 100 and the user apparatus 200 has at least the functions implementing the first and second embodiments. However, each of the base station apparatus 100 and the user apparatus 200 may have only some functions of the first and second embodiments.
<Base Station Apparatus 100>
The transmission unit 110 includes functions to generate a signal to be transmitted to the user apparatus 200 and transmit the signal wirelessly. The reception unit 120 includes functions to receive various signals transmitted from the user apparatus 200 and obtain, for example, information of an upper layer from the received signals of a physical layer. In addition, the transmission unit 110 has functions to transmit, to the user apparatus 200, a NR-PSS, a NR-SSS, a NR-PBCH, DL/UL control signals, and so forth.
The setup information management unit 130 stores previously set setup information and various setup information to be transmitted to the user apparatus 200. The contents of setup information are, for example, information concerning a NR-PSS and a NR-SSS, information included in a NR-PBCH, information concerning a SCS, information concerning configurations of SS blocks included in a SS burst set and transmission periods, information concerning DL/UL control signals, and so forth.
The resource mapping control unit 140 performs control of mapping of SS blocks in a radio frame in the base station apparatus 100 described above for the basic example and the first and second embodiments. In addition, the resource mapping control unit 140 maps control signals, data, and so forth in a radio frame. A radio frame in which the resource mapping control unit 140 performs mapping is used by the transmission unit 110.
<User Apparatus 200>
The transmission unit 210 generates a transmission signal from transmission data and transmits the transmission signal wirelessly. The reception unit 220 receives various signals wirelessly and obtains information of an upper layer from the received signals of a physical layer. In addition, the reception unit 220 has functions to receive a NR-PSS, a NR-SSS, a NR-PBCH, DL/UL control signals, and so forth transmitted from the base station apparatus 100.
The setup information management unit 230 stores various setup information received from the base station apparatus 100 through the reception unit 220. The setup information management unit 230 also stores previously set setup information. The contents of setup information are, for example, information concerning a NR-PSS and a NR-SSS, information included in a NR-PBCH, information concerning a SCS, information concerning configurations of SS blocks included in a SS burst set and transmission periods, information concerning DL/UL control signals, and so forth.
The initial access control unit 240 performs control concerning an initial access in the user apparatus 200 described above concerning the basic example and first and second embodiments. Note that the functional units concerning signal transmission in the initial access control unit 240 may be included in the transmission unit 210, and the functional units concerning signal reception in the initial access control unit 240 may be included in the reception unit 220.
<Hardware Configuration>
The block diagrams used in the description for the above-mentioned embodiments (
Further, for example, each of the base station apparatus 100 and the user apparatus 200 according to the mode for carrying out the present invention may function as a computer that performs the processes according to the present carrying-out mode.
Note that, below, the term “device” may be read as a circuit, a unit, or the like. The hardware configuration of the base station apparatus 100 and the user apparatus 200 may be configured to include one or more of the devices 1001-1006 illustrated, or may be configured not to include some of the devices 1001-1006 illustrated.
Each function in the base station apparatus 100 and the user apparatus 200 is implemented as a result of hardware such as the processor 1001 and the memory 1002 reading predetermined software (program), and thereby the processor 1001 performing operations to control communication by the communication device 1004 and control reading data from and/or writing data to the memory 1002 and the storage 1003.
The processor 1001 controls the entirety of the computer by causing an operating system to operate, for example. The processor 1001 may include a central processing unit (CPU) that includes an interface for a peripheral device, a control device, an arithmetic device, a register, and so forth.
Further, the processor 1001 reads a program (program code), a software module, or data from the storage 1003 and/or the communication device 1004 onto the memory 1002, and thus implements various processes according to the read information. As the program, a program that causes the computer to perform at least some of the operations described above for the above-mentioned carrying-out mode is used. For example, the transmission unit 110, the reception unit 120, the setup information management unit 130, and the resource mapping control unit 140 of the base station apparatus 100 illustrated in
The memory 1002 is a computer readable recording medium and includes, for example, at least one of a ROM (Read-Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and so forth. The memory 1002 may be called a register, a cache, a main memory (main storage), or the like. The memory 1002 can store the program (program code), the software module, or the like executable for implementing the processes according to the mode for carrying out the present invention.
The storage 1003 is a computer readable recording medium and includes, for example, at least one of an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (for example, a card, a stick, or a key drive), a floppy (registered trademark) disk, a magnetic strip, and so forth. The storage 1003 may be called an auxiliary storage device. The above-described recording medium may be, for example, a suitable medium such as a database, a server, or the like that includes the memory 1002 and/or storage 1003.
The communication device 1004 is hardware (a transmission and reception device) for performing communication between computers through a wired and/or wireless network and may also be called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission unit 110 and the reception unit 120 of the base station apparatus 100 may be implemented by the communication device 1004. Further, the transmission unit 210 and the reception unit 220 of the user apparatus 200 may be implemented by the communication device 1004.
The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a LED light, or the like) that performs outputting to the outside. The input device 1005 and the output device 1006 may be configured as one unit (for example, a touch panel).
Further, the various devices such as the processor 1001 and the memory 1002 are connected together via a bus 1007 for performing communication of information. The bus 1007 may include a single bus or may include different buses corresponding to the devices.
Further, each of the base station apparatus 100 and the user apparatus 200 may include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array). The hardware may implement some or all of the functional blocks. For example, the processor 1001 may be implemented by at least one of these types of hardware.
(Summary of Carrying-Out Mode)
As described above, according to the mode for carrying out the present invention, a base station apparatus that performs communication with a plurality of user apparatuses is provided. The base station apparatus includes a transmission unit that transmits a plurality of radio signals to the plurality of user apparatuses; and a control unit that arranges periodic blocks including a synchronization signal and system information in one or a plurality of radio signals from among the plurality of radio signals on the basis of a subcarrier spacing.
In the above-mentioned configuration, in the radio communication system including the base station apparatus and the user apparatuses, the base station apparatus suitably arranges blocks including a synchronization signal and system information in a radio signal to implement an efficient resource arrangement.
In the plurality of radio signals, an arrangement of the blocks may be implemented in such a way that opportunities to transmit control signals by the base station apparatus or a user apparatus increase. In this configuration, opportunities to transmit control signals are increased and efficient communication is implemented.
In a radio signal where periodic blocks are arranged, a first block and a second block that is the next block placed after the first block may be non-continuously arranged. In this configuration, flexibility of a resource arrangement is improved and it is possible to avoid overlapping with a control signal.
In a radio signal where periodic blocks are arranged, one or a plurality of symbols not including a synchronization signal may be placed between a third block and a fourth block that is the next block placed after the third block on the basis of a subcarrier spacing. In this configuration, the number of symbols provided between a block and another block where a block is not transmitted is changed according to a subcarrier spacing, and a control signal can be transmitted during a period of the symbols.
In the plurality of radio signals, an arrangement of blocks may be implemented in such a way that a period where a block is placed and a period where a control signal transmitted by the base station apparatus or a user apparatus is placed are separated. In this configuration, a gap common to a plurality of radio signals configured at different subcarrier spacings is provided, and flexibility of an arrangement of control signals is improved.
In a radio signal where periodic blocks are arranged, the number of blocks arranged in a predetermined period and positions of symbols where the blocks are arranged may be based on a subcarrier spacing; and, in each of the plurality of radio signals where periodic blocks are arranged, the number of blocks required for a user apparatus to start communication and associated with a single beam may be uniform in a predetermined period. In this configuration, the user apparatus 200 can perform an operation to start communication in a period that is uniform and common among the plurality of radio signals configured at different subcarrier spacings, resulting in that efficient initial access operations can be implemented.
(Supplement to Carrying-Out Mode)
Thus, the mode for carrying out the present invention has been described. However, the disclosed invention is not limited to such a mode for carrying out the present invention, and the person skilled in the art will understand various variants, modifications, replacements, and so forth. Although specific numerical values have been used as examples for promoting understanding of the invention, the numerical values are merely examples unless otherwise noted, and any other suitable values may be used instead. The classifications of items in the above description are not essential to the present invention, contents described in two or more items may be used in combination if necessary, and contents described in an item may be applied to contents described in another item (unless a contradiction arises). Boundaries between functional units or processing units do not necessarily correspond to boundaries of physical components. Operations of a plurality of functional units may be physically implemented by a single component and an operation of a single functional unit may be physically implemented by a plurality of components. Concerning the operation procedures according to the mode for carrying out the present invention, the order of steps may be changed unless a contradiction arises. For the sake of convenience for describing the operations, the base station apparatus 100 and the user apparatus 200 have been described with the use of the functional block diagrams. However, these apparatuses may be implemented by hardware, software, or a combination thereof. Each of the software functioning with the processor of the base station apparatus 100 according to the mode for carrying out the present invention and the software functioning with the processor of the user station 200 according to the mode for carrying out the present invention may be stored in any suitable recording medium such as a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, or a server.
Further, sending of information may be implemented not only according to the mode for carrying out the present invention described herein but also by another method. For example, sending of information may be implemented with the use of physical layer signaling (for example, DCI (Downlink Control Information) or UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (a MIB (Master Information Block), or a SIB (System Information Block)), or another signal, or a combination thereof. Further, RRC signaling may be called a RRC message, and, for example, may be a RRC Connection Setup message, a RRC Connection Reconfiguration message, or the like.
Each mode for carrying out the present invention described herein may be applied to a system that uses a suitable system such as LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), or Bluetooth (registered trademark), and/or a next-generation system expanded on the basis thereof.
Concerning the operation procedures, sequences, flowcharts, and so forth according to each mode for carrying out the present invention described herein, the orders of steps may be changed unless a contradiction arises. For example, concerning the methods described herein, various step elements are illustrated in exemplary orders and are not limited to the illustrated specific orders.
Specific operations performed by the base station apparatus 100 described herein may in some cases be performed by an upper node. It is clear that various operations performed for communication with the user apparatus 200 can be performed by the base station apparatus 100 and/or another network node (for example, a MME, a S-GW or the like may be cited, but not limited thereto) in a network that includes one or more network nodes including the base station apparatus 100. In the above, description has been made for the case where the another network node is a single node as an example. However, the another network node may be a combination of a plurality of other network nodes (for example, a MME and a S-GW).
Each mode for carrying out the present invention described herein may be solely used, may be used in combination with another carrying-out mode, or may be used in a manner of being switched with another carrying-out mode at a time of being implemented.
By the person skilled in the art, the user apparatus 200 may be called any one of a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, and other suitable terms.
By the person skilled in the art, the base station apparatus 100 may be called any one of a NB (NodeB), an eNB (enhanced NodeB), a gNB, a base station, and other suitable terms.
The term “to determine” used herein may mean various operations. For example, “to determine” may mean to consider having determined to have performed judging, calculating, computing, processing, deriving, investigating, looking up (for example, looking up a table, a database, or another data structure), or ascertaining, or the like. Also, “to determine” may mean to consider having determined to have performed receiving (for example, receiving information), transmitting (for example, transmitting information), inputting, outputting, or accessing (for example, accessing data in a memory), or the like. Also, “to determine” may mean to consider having determined to have performed resolving, selecting, choosing, establishing, comparing, or the like. That is, “to determine” may mean to consider having determined a certain operation.
Words “based on” or “on the basis of” used herein do not mean “based on only” or “on the basis of only” unless otherwise specified. That is, the words “based on” or “on the basis of” mean both “based on only” and “based on at least” or both “on the basis of only” and “on the basis of at least”.
As long as any one of “include”, “including”, and variations thereof is used herein or used in the claims, this term has an intended meaning of inclusiveness in the same way as the term “comprising”. Further, the term “or” used herein or used in the claims has an intended meaning of not exclusive-or.
Throughout the present disclosure, in a case where an article such as a, an, or the in English is added through a translation, the article may be of a plural form unless the context clearly indicates otherwise.
Note that a signal configured at a single SCS and including a plurality of radio frames occurring in the time direction is one example of a radio signal. The resource mapping control unit 140 is one example of a control unit. A plurality of symbols to which a single SS block is mapped or a single SS block is one example of a block.
Thus, the present invention has been described in detail. In this regard, it is clear that the person skilled in the art understands that the present invention is not limited to the mode for carrying out the present invention described herein. The present invention can be implemented in a modified or changed mode without departing from the effect and the scope of the present invention. Therefore, the description herein is for an illustrative purpose and does not have any restrictive meaning.
Nagata, Satoshi, Harada, Hiroki, Takeda, Daiki
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Aug 27 2019 | TAKEDA, DAIKI | NTT DoCoMo, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 051309 | /0326 | |
Aug 27 2019 | HARADA, HIROKI | NTT DoCoMo, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 051309 | /0326 | |
Aug 27 2019 | NAGATA, SATOSHI | NTT DoCoMo, Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 051309 | /0326 |
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